Sounds like the inverter is faulty and may need repairing, you will have to take it to a repair shop for inspection, if it is the inverter or the inverter coil, it should be fairly inexpensive to repair

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Follow these steps - Update drivers for your hardware. black Screens are hardware or driver related so updated drivers could fix the cause of the STOP error.- Check for registry issues If this didn't help you then finally i will suggest you to get system utility program like PC Fresher. because it is a very useful tool that cleans your computer of temp files, history and cookies. Its also used to fix any registry errors that cause black screen

- Return BIOS settings to their default levels. An overclocked or misconfigured BIOS can cause all sorts of random issues, including BSODs. - Update drivers for your hardware.just go to site of your laptop manufacturer Once there enter the model number OR service tag of the laptop then request driver (usually found in the web site's "Support Section"). There you should be able to find all the drivers for your model laptop Most Blue Screens of Death are hardware or driver related so updated drivers could fix the cause of the STOP error.

If problem still exists, then I will suggest you to get Intel software partner reliable program Reginout to fix your annoying blue screen problem.

1. Double-click the sound icon in the lower-right corner of the
desktop. This loads the audio options menu onto the screen. Make sure
none of the audio options are set to "Mute." If they are, uncheck the
options, and the sound returns.
.
2. Disconnect any headphones you have connected to the "Line-out" port
on the Acer laptop. If headphones or anything else is connected to the
line-out, the audio is not going to be produced by the computer's
built-in speakers.

3. Connect your computer to a local power source. If the battery is
running low, the laptop often stops producing audio as a method to
extend the battery life.

4. Download updated drivers for the Acer computer. If the sound drivers
are out of date, the audio is not going to project from the speakers
properly. Navigate to the Acer website, choose your country of origin,
then click "Service and Support." Click "Driver Download" in the left
corner of the screen and click the kind of computer you have. Choose the
exact make and model of your computer and all of the available drivers
are displayed. Click the audio driver and it downloads to your computer.
Double-click the downloaded file, then follow the prompts to install
the updated driver. Restart the computer and the audio now plays
correctly on the system.
...........................................Read this article: No sound on Acer Computer

That is a problem with the Video Card. My old laptop started having that problem too. Try to download new drivers for your laptop if possible. If your laptop is still under warranty and the updated drivers don't work, call Acer to ask them about it, and possibly send it in for repair. If your laptop is not under warranty you can:

Find new parts on eBay and try to fix it yourself (not recommended), or

bad driver on screen i would booot it in safe mode hold f8 then go to control panel then classic view then programs fetures remove compaq onbord video driver ten reboot get new one in from windws update or updated driver compaq .com need seroius updates no matter if its new

You have installed graphics drivers which are not compatable with your laptop. Use the disks that came with it and reinstall the original drivers, windows update might have installed one that is not suitable